Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff53cd01998d07af…

MALICIOUS

PDF

78.1 KB Created: 2021-09-09 05:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1f1540ff3c154d596e2e58ed6885d6ac SHA-1: cb33e2ebfaba9d1f4a73cedc5b766b24c92f56ff SHA-256: ff53cd01998d07afc238ebc3cf8395566a870e8fed1aacdc741b475f3a96e73a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=drastic+emulator+pokemon PDF link annotation
    • http://geoplan.su/userfiles/file/zoxudaxajufidarotokavuzak.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea44f68f1a---nirezufobe.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/xotenowigab.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/d182767aaaab0966e711770700a44b9f/66820720471.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/miponuna.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/moguk.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/momodajaketitalupusileju.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/31333008809.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/8182499047.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/41427449717.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/tixogudutut.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/rizibosufus.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/97706686095.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/37641430071.pdfIn PDF document text
    • http://usateatop.com/_upload/files/27443281968.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/bigizezodisul.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/54174130120.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/23689046988.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/tenitujunofali.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/36150917240.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/lamojofejigax.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/70363032378.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 17872 bytes
SHA-256: 7858517df1ddae7b9a3ad70148efc4985ff64c004d674798105f2842d902169f
font_01_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 10728 bytes
SHA-256: 6ae3ad4b86dbb476a23e3c40013c43ccd297487bdfc06a7a4b1103208e8241a3

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